This in not possible itself. If you want REALLY and PERMANENTLY erase your MyHeritage profile, write it to support@myheritage.com or from "Contact form" in tom menu.
But if you want, you may simple remove itself from any other site, where you are memeber - http://www.myheritage.com/FP/my-sites.php
I have a similar problem and want to delete or edit another member’s profile. I accidently entered the email address of a family member I want to invite in the field below it. Now that member has someone else’s email address assonated with it, and when I try to enter that address into the correct members address box the wrong profile gets listed as being invited. I have removed the offending profile from my site but it keeps coming back every time Invite the correct member. I just want it to go away; I don’t even want that member on my site.
I don't want to delete my profile in Family Tree, but I inadvertantly added two other trees that I want to delete. Do you happen to know how to do that?
I find it frustrating that it's not possible to ask a direct question of all of this.
Are you able to email me direct to discuss your opinion of My Heritage and how it works, and maybe share ideas for making it work better?
If you are webmaster ot these wrongly created trees, simply write your request for deleing to support@myheritage.com or through www form (see link in top menu). Do not forget attaching number of "site ID" for deleting - take it from browser URL:
http://www.myheritage.cz/site-123456/xxxxxxx