I have always liked the idea of Bomberman spraypainted all over the place, but of course, cannot do so at work. Instead I traced over one of the scans I had handy from the trading card set and made a sign for my office door. Everyone at work has these 3><5 metal frames with simple text reading their last name and room number. I got approval to jazz mine up and included it below. A coworker wants her dog on her sign, so sometime I'll get to that for her.
His face is the info mentioned on the original sign, making him appear Jack-o-Lantern-ish a bit. In his hand, instead of a bomb, is a flaming hot pepper corn muffin, for which I am known by locals and random internet people.
Feel free to include any of your own fun signs, spotted local bomberman pranks, etc. I have yet to deface public property with spraypaint and a stencil, but it is very tempting.