When I first started I never thought to ask permission to link to other's blogs. Then ppl would ask ME if it was OK so I thought I must have totally missed a huge "blogging etiquette" thingy. I've never had someone ask to remove their link tho
Now I actually prefer that someone asks - and I ask to see their site too - I've had trouble w/ spammers and some VERY unfriendly ppl and whatnot so I just want to be sure that I'm not getting linked on an adult-content site or something (you never know these days
That said tho I've come across lots of other blogs that link to me and I'm totally fine w/ whether or not they asked me in the first place - I'm actually tickled pink when I see MY name/site on someone else's blog!!