I realize the OP is addressing "pros", and while I can understand how listing your equipment might seem "tacky" to some, perhaps especially a pro, (I'm not, and I do it), I would submit that *most* photography forums are populated, by-and-large, by
enthusiasts, not professionals. Of the vast number of Pentaxians who post here, how many make a living with their equipment? I find a gear list interesting, and it also lends a little bit of friendly familiarity with the poster- perhaps some comradery, lol. If you browse car forums and bike forums and the like for example, it is a common thing to list your mods and stuff in your sig. Of course, with these responses I now feel a tiny bit lame...