Search Results: finding a date with online dating

DISCLAIMER: The above picture is NOT fully representative of the question/poll!

I often see people who set up online dating profiles either:
1. Say they are not looking for a relationship, only friendship (and are probably single).
2. Say they are in a relationship, and are looking for friends.
3. Have photos of them with their boyfriends/girlfriends on them.

I am not going to lie, I feel like women are particularly guilty of this, but I could be wrong, since I am heterosexual.

Now, my dilemma is this: dating sites are for dating; but even in real life dates can turn out to be great friends, and friendships can turn to relationship. So should it be acceptable to register on a dating site, and have an active account, if you do not even want to date in the first place?

The way I see it, there are a few approaches:
1. I condemn people who explicitly express they don't actually want to date on a dating size; I think they should be banned or deactivated. (I don't know how this could be accomplished, I am asking on a purely moral ground. If you have ideas, I welcome them).
2. I condemn such people, but I wouldn't do anything about it - people should be able to misuse the site to their liking.
3. I think finding friends on dating sites is perfectly acceptable, and a great way, and I possibly would do it/have done it myself.

So, what is your opinion?