I am not sure how I would feel if someone tried to copy me. They would have to be mad for a start!
The only thing I would be a little concerned about though would be if they approached my customers to say they worked for/with me, or worse, to say I had passed my work on to them. This has happened to me in the past. Fortunately all my customers knew me well enough to know I would tell them beforehand if I were to sell up or move on, so I didn't lose any.
John