Been reading google guidelines for unnatural links,
and it says this about signing comments in forums with a link:
"Forum comments with optimized links in the post or signature, for example:
Thanks, thatís great info!
paulís pizza san diego pizza best pizza san diego"
I have in 2 forum my sites url in the signature but without anchorwords, and after many years posting they are quite some.
I just took away the signature, but I wonder if that is necesarry as it is not optimized as google says, its only the url to the index page.