My comments were not specific to anyone's cases though i perfectly understand that there are genuine cases where staying out of US is the only choice to get things done. Things happens at times when you least expect them and you have to do what you have to do, but staying away from the US and using GC to only use it as a fast pass to enter the US for a short vacation to keep the GC 'alive' is what i feel bad about. I had come across a lot of posts where the applicant has been here in the US for a long time and waiting patiently for the GC and once the GC has been approved, the first question posted by the applicant is "How long can i stay out of the US?". "Will staying out affect my eligibility for citizenship". "How long is the re-entry permit valid for and how many times can i use it"
No offence to anyone here, but to keep the GC, one must reside in the US. It is called Permanent Residence for a reason. For a PR, any stay abroad has to be temporary in nature. If the intention is to not stay here permanently, then why apply for GC? I am talking about those who have a pre-conceived notion of getting a GC for the sole purpose of using the US as a base to travel back and forth while living elsewhere.
Coming back to the OP's question regarding a re-entry permit. One must prove strong ties with US, like owning assets, investments, a valid residential address in the US, filing tax returns as a resident and so many other things. If one cannot prove these ties with US and uses the re-entry permit often, there will definitely be a lot of questioning at the POE and there might be a situation where the GC might be revoked as the person did not demonstrate the intent to stay in the US permanently.
My 2 cents... Feel free to pounce on me
http://www.immigrationportal.com/showthread.php?t=199369
http://www.immigrationportal.com/showthread.php?t=200039
http://www.imminfo.com/articles.html#lprabandonment