well, it doesn't hurt to have, and it couldn't be easier. oh, It's fun too.
Example:
you see something fun on youtube you can just throw a link in here to share the fun.
just use common sense and don't link to porn or other stuff that could offend anyone etcetcetcetc
I've watched this ------ ---- about 30 times
__________________
(\_/) This is Bunny. Copy Bunny into
(O.o) your signature to help him on
(> <) his way to world domination.