Earlier quoted context omitted.
This was a while ago, but Gandi disabled my account - with no warnings - for running a Tor node on one of my VPSes. I then had to send a copy of my passport to eventually get it reenabled. The frustrating thing was that they were also my domain registrar, so during that time I lost all access to my domains as well. I transferred my domains away after that and decided it wasn't wise to mix services together due to thi…
Maybe not for running a Tor node, but Gandi may have received complaints about traffic on this node ? Gandi allows any service to be run on its platform, abuse is not allowed as it isn't on other provider. Thus, they must do the necessary legal operations according to the law, policies and their contract.
From the Gandi blog: (http://www.gandibar.net/post/2007/01/11/Gandi-fights-back-ag...)
Domains registered with Gandi must be used in accordance with the rights of third parties (copyrights, intellectual property rights, personality rights, etc.), and current applicable laws and regulations.
For example, Gandi does not tolerate activity that is morally objectionable or that poses a threat to public order, that spreads Computer Contaminants (Viruses, Trojans, etc.), and/or that engages in fraudulent activity such as Identity Theft.
Some of these things are fairly broad and vague. There's the whole grey area of speech that may or may not violate the rights of a third party. Then you have the whole "public order" thing. Plus, you're potentially dealing with French legal standards, which may be very different than the US standards that I'm used to.