It is a risk. I had a problem with my Google account, and while I was able to find a human to email about it, they were completely unable to help. It was literally "you have to do the thing, even though it makes no sense, because that's what our algorithm requires" (in my case it was repurchase an old domain in order to prove that I owned it, so they could cancel the account associated with that domain. Literally makes no sense, but it was the only way their process could work). That was my "ruh-oh" moment when I realised their products are basically unsupported and therefore shouldn't be used in production.
What happens if the domain-name is repurchased by someone else or claimed by Sedo, etc?