The flirting going on on this forum has just been play flirting. I mean, we are talking about posting pictures of chocolate, tractors, and nothing explicitly sexual has been mentioned. As well, I've met most of the people doing the flirting, and they didn't flirt with each other when together in person.
Sending a flirting sms messages is another matter altogether! Of course, you need to know the people involved and their how their friendship works, but I most certainly would not like it if my husband was getting messages in the day from a female friend who was flirting with him.
None of my male friends have ever flirted with me by sms because they know me and know I like my friendships with men to be the same as with a woman (okay, minus the shopping excursions
). Maybe I'm just too square - but it suits me just fine and my husband never needs to feel jealous.