Filed my citizenship application just a fortnight ago. I had one conviction for disorderly conduct in 1998 for which I paid $ 100 fine. Would this be considered my second conviction making me deportable ??
According to this:
http://en.wikipedia.org/wiki/Moral_turpitude
disorderly conduct is not considered a crime involving moral turpitude. The relevant part of CFR 8.12.II.IV. § 1227 about multiple convictions making one deportable,
http://www.law.cornell.edu/uscode/8/usc_sec_08_00001227----000-.html, reads:
"(ii) Multiple criminal convictions Any alien who at any time after admission is convicted of two or more crimes involving moral turpitude, not arising out of a single scheme of criminal misconduct, regardless of whether confined therefor and regardless of whether the convictions were in a single trial, is deportable."
So, since your 1998 conviction did not involve CMT, it looks like you would not be deportable on multiple convictions grounds even if it turns out (as seems unlikely to me) that your fare evasion thing is a criminal offense involving CMT.
Since you are so worried and are panicking (which, IMO, you should not be), I'd suggest that you consult a criminal lawyer familiar with the NY law as well as, perhaps, an immigration lawyer. A criminal lawyer should be able to tell you if the fare evasion offense you are charged with is a criminal or a civil one.
I also think that regardless of whether it is a criminal or a civil offense, it is a good idea for you to contest the ticket, go to the hearing and see what happens. Even if it is true that MTA adjudicators have an 85% conviction rate, you might fall into the lucky 15%. You never know until you try. The only thing to remember here is that by the time of the naturalization interview you need to have the ticket disposed of one way or another (either pay the fine or have it dismissed) since at the interview the IO will want to see the proof of disposition of the ticket.
I am not a lawyer and not much of an expert, but I think you should not withdraw your N-400 and should go to the interview and see what happens. It seems likely to me that you will be approved. Remember, the IO has pretty wide discretion in adjudicating such cases. EVEN if an N-400 applicant is bona fide deportable, the IO, in most cases has the discretion to approve the N-400 application anyway. There have been lots of cases of this kind reported in this forum, e.g. people who have unlawfully voted in U.S. elections and still got approved for naturalization. Also, again even for bona fide deportable cases, the IO has the discretion to deny the N-400 but not refer the case for deportation proceedings. Of the cases of technically deportable aliens, the number of those where N-400 is denied and deportation is initiated is very small and usually happens if more serious crimes were involved.
In your case it looks to me like the absolute worst that could happen is that your N-400 is denied this time around on lack of GMT grounds and that you have to wait several more years before you can re-apply again. I should say that based on what you reported here, this outcome appears to me fairly unlikely.
Instead of panicking, you should treat your situation as a practical problem requiring a practical solution. Talk to the lawyers, go to the hearing to contest the ticket and proceed from there.