If people went afk on siege after dying, can't they just force respawn?
If you have the equipment screen open, you will not respawn. People on seige were doing this so that it didn't look as suspicious or couldn't be reported as a leacher. As annoying as it may be, it really is not that big of a deal to not leave the menu open.
...However, the multiplier reset for missing a round is a bigger problem. You are essentially locked into not leaving your computer if you do not want to lose your multi. I have no problem missing xp from not getting in on a round, because I had to use the restroom, got a drink, had to answer the phone/door, went out to smoke. Just don't take my multi away because I had to leave my chair for a few minutes.