Blocking sites won't be a solution for everyone.
There is an easier solution that will just take under 10 seconds, and you won't be able to play with those bitcoins. Yes, send them all to me

btw, would anyone be interested in an escrow that just holds the funds for a fixed period and then releases it?
There was actually someone in the past who offered that service, but the problem was that there is always a risk of the escrow running away with the funds , and even if not, holding your funds with a third party isn't really a smart move. I would rather advice to make a paper wallet out of the funds and have a family member hold it for you for an extended time.