Last fall season, we saw the beginning of a major fishnet epidemic. I am NOT talking about the traditional showgirl fishnets; the fishnets I'm talking about are modified tights with cut-out argyle patterns or other patterns. These are cheap and well-made, and can be bought for around $6.
When wearing these I would suggest at least a knee length skirt or something close to it. If you go all-out on tights, then you want something more demure over them. If you went short, people might get the wrong idea. As for shoes, wear a cute flat (remember diamond patterns mean pointed toed shoes, round patterns- round toe) or a sexy boot.