Indeed. I think the likelihood is high that if I were given obvious hints by a female coworker, I would probably not pick up on them, because to me, coworkers are off limits[1]. If a coworker were interested in me, she would probably have to actually say it to me outright or I'd brush it off as a joke/over friendliness/me misinterpreting the situation or something like that.
[1] I don't like the idea of coworkers dating because if they break up, it can be messy and cause all sorts of problems for them and for their other coworkers. Having said that, if I really liked a coworker and she was interested in me, I probably wouldn't let that stand in my way either, but it is something I'm conscious about. If she were on my team, I would at least ask to move to another team.
[1] I don't like the idea of coworkers dating because if they break up, it can be messy and cause all sorts of problems for them and for their other coworkers. Having said that, if I really liked a coworker and she was interested in me, I probably wouldn't let that stand in my way either, but it is something I'm conscious about. If she were on my team, I would at least ask to move to another team.