Originally Posted by 98kellrs

Why would you put Charlie89 as your watermark, your name is Kym and I doubt you were born in 89. There isn't an exact level of editing that avoids copyright, it's more to do with substantial similarity. You would be liable for prosecution if you made a decent sketch of a photograph even.

Disclaimer: This a guide only based on my readings of photographic copyright laws, please seek professional consultation before doing anything regarding above topics!