Use of svnserve and Dropbox

One of the nice thing about Dropbox is that you can share files
between various users. I will sometimes keep a Subversion repository
on Dropbox, so I can access it on various systems. Right now, it's
just for me to use.

Here's the scenario:

* I have my Dropbox under $HOME/Dropbox.
* I create a Subversion repository on $HOME/Dropbox/svn_repos
* I now share my $HOME/Dropbox/svn_repos folder between my colleagues.

What happens if we all start svnserve on that particular shared folder
in Dropbox? Is there an issue with possible collisions if two or more
people attempt to commit their changes at the same time?

What if we skip the svnserve route and merely use the file://
protocol? Is this any safer?

-- 
David Weintraub
qazwart_at_gmail.com