Sacred Haven of Debauchery

and in Belarus, the chances are likely to be among the lowest

No) The KGB will apprehend me right at the border. Just like in Russia.

Where else is there such a problem in the Soviet Union?

In other parts of the Soviet Union, there is a risk of extradition to Russia.
In the Euro-Soviet Union, the risk of deportation is lower, at least for now.

although in a country like Switzerland, it is very low

That's exactly why the risks should be minimized as much as possible.