Probably not the best person to advise since I'm not an Amerifat, but I'd recommend speaking to anyone in authority who might be able to help (not sure if you have anything like a Citizen's Advice Bureau, or else contact the government agency responsible for paying this and asking them).
The main things you will need to consider is:
- how much will you be getting, how often you will be getting it and how long you will be in receipt of it for
- under what conditions you will have to remain in order to remain eligible to receive it
- what you cannot do in order to remain eligible (e.g. take up part-time or full-time employment, volunteer, doing unpaid work or interning)
- whether it will affect any insurance you may already have or may decide to take up in the future
- what happens once you reach retirement age
- any other downsides that may be applicable if you decide to take receipt of it
At the end of the day, if you are entitled to receive any form of assistance, there is absolutely no moral or ethical problem in accepting it. If this is something you can sign on and off to at relative ease, you could sign up and if you are at unease after a few months you can reconsider your position.