Hello Michael
The answer to your question (unfortunately) is yes. If you have a client IN THE SAME DOMAIN with the SAME PASSWORD that has a higher revision number, the servers will all revert to the highest revision number. Just like Rene said, because a VTP server is also a client, it will be updated by any device with a higher revision number.
Having said that, if one is careful (with the appropriate domain names and passwords) VTP can be very useful. Just be careful.
Concerning the domain names, if a client does not have a domain name set, then it will automatically adopt the domain name of the extant VTP server (if one exists). If the client has already been configured with a domain name and it is different than that of the server, you can manually change the domain name so it matches. Once that’s done (and passwords match as well, if any) then propagation will take place.
I hope this has been helpful!
Laz