I reckon TinyURL is good. Much better than huge URLs. It seems some don't like it though. The reason being that there is no indication where a link leads to. I suppose it might be possible to follow a TinyURL link that leads to some malicious site or other but that's not any more likely than if you follow any other sort of link in my opinion. I once made quite a few posts in a computer forum before discovering that my TinyURL links weren't being trusted by small number of members. Dead hurt I was!

Anyway, since then, I use the actual URL if it's not too long, or hide the link behind some text using BBCode if it is ...
like this. If you hover the mouse over this link, the actual URL shows up in the browser Status Bar.