Another solution is to institute a house (or cabin) rule: If the cue ball is near the bad cushion and a short cue would be required for the shot, the player may move the cue ball off the cushion by up to a hand span. (The player's hand must be able to touch both the nose of the cushion and the cue ball after repositioning.)
That will reduce the effectiveness of some safeties, but without that rule some safeties are much more effective than in a large room. I used to play frequently on a table where a post was 58 inches from a corner pocket. The "post hook" was a well-known strategy on that table.
Yep, that would be an acceptable solution also.
The bar I play at frequently has some shelve's on the wall that are just the right height to get in the way of your stroke if the ball is within about 6-10" from the rail. There is no doubt I have played safe's on people utilizing those shelves. There's also a bar in a neighboring town that has a big pole in the way, it's about 4 feet from the table so you can imagine it gets in the way and yep, safety's were well planned there

All that being said - the equipment, whether bad or good, affects both players.