No, don't get rid of it. Let people respect posts and it will fix the forum. It's like you could only dislike it if you're not likely to ever get likes.
For me, it has helped me a lot to not feel so alone on this forum, because for every person who has reduced my contributions and refuted them without actually discussing it, a few people have liked those posts too, or PM'd me and encouraged me and told me not to listen to people who don't understand etc.
It is a good feature, and it should be expanded. You should be able to get negative rep, too. Even though it would be abused against my favor, I'm likely in a minority in that sense, and so it should probably be there.
if it ends up abused, okay, then consider it then, but maybe, just maybe, there is a potential to really make GTA Forums stronger than ever by keeping it on people's minds that they need to treat the forum as a forum, and not a troll station etc.
Imagine if you could get too many negative votes to see a post here? Similar to youtube's collapse of posts. provided that wasn't abused by ninnies, it could be a very good incentive for people to post smart.