Well, that can be easily avoided, Marioh. The calculation would only be applied if it increased your stroke-play average score. Also, it might only be used for multi-player rounds, and forfeited for single-player rounds.
In addition, the following should also be introduced, to address Soulcatcher and the issue mentioned in the first paragraph of my previous post:
- If someone is about to par-putt & quits, that hole should be counted as a bogey & the score should only be extrapolated afterwards.
- If someone is about to bogey-putt & quits, that hole should be counted as a double-bogey & the score should only be extrapolated afterwards.
- If someone is about to double-bogey-putt & quits...... >>> triple-bogey counted and only then extrapolated.
- If someone quits after the 1st or 2nd shot, without the ball being on the fairway >>> count the hole as a bogey, only then extrapolate. [I can't even tell you how many folks quit on me immediately after driving into the woods on Bethpage, hole 1!]
- If someone quits before making a shot that should have ensured Green-in-Regulation for them, or has already failed to reach GIR on that hole >>> count that hole as (at least) a bogey, only then extrapolate the score. (Another example: someone quits before taking a 4th shot while still being off-green on a par-4 hole: count the hole as a triple-bogey, with 2 putts taken for granted & 1 more shot counted in as a penalty.)
With all these extra measures in place, the calculation method alluded to by rlsj13 might perhaps be employed here on WGT as a quitting deterrent. 
Of course, everyone would still be offered the option to finish each forcibly interrupted round later on (as already happens today), so that no one would be punished for involuntary disconnections. The extrapolated calculation would only be applied at the moment of voluntarily forfeiting an interrupted game (or voluntarily quitting it in the first place).
PS: For other quitting deterrents suggested previously, see here.