wait??!!
 i you can join the AARP when you're only 50??? holy moly!!!!!!!!!   i'm friggin 49 now!!!!!!!!  i can't effin be THAT old yet!!!!!1 
 
I'm only 41 and AARP has been bombarding me with junk mail for more then 10 years.  I have no idea how I got on to their mailing list, but I make a point of shredding their letters.  Then I put the shreds into the handy postage paid envelope they include and pop it in the mail back to them.
AARP will never get a dime of my money.