If you use your HP in a defensive situation, the miscreant (or surviving relatives) will be suing you for shooting him intentionally. The safeties on the gun will be irrelevant.
Not necessarily true. It is a pretty common practice in civil cases for the plaintiff to claim that the shot was fired unintentionally (even when this is clearly not true). That's one of the reason that cities like New York mandate such heavy trigger pulls on their pistols. In a case like that, the removal of the magazine disconnect could well come up since it:
A) Deactivates a factory-installed safety device
B) Lightens the trigger pull (making an unintentional shooting argument possible)
I think one thing we need to remember is that even in a justifiable shoot, if the bad guy lives he will be enjoying free legal services and ample spare time. Its not inconceivable that he would use these to harass you with any manner of lawsuits regardless of how little basis there is in them.
Even if the bad guy doesn't live, there isn't any shortage of hungry lawyers willing to take the civil case on contingency figuring they can argue a settlement out of it.
According to my CCW class from a year or so back, there had been 44 CCW-related shootings in Texas and 42 no-bills (grand jury ruled it justifiable - one of the ones the grand jury indicted on was later found not guilty, other one hadn't gone to court at the time of the class).
For these 44 shootings, there were 44 civil suits. In one case, the long estranged ex-wife of the deceased scumbag stepped up to sue, hoping to recover child support that the scumbag had never paid and now never would. The cost of defending yourself from grand jury to civil suit ranged between $10,000 and $55,000 for these cases.
In all the years since 1935, there have been no cases of anyone being sued because the mag disconnect has been removed from the BHP.
I certainly haven't ever heard of anyone being sued because the magazine disconnect on their Browning Hi-Power had been removed; but I do wonder what source you base this statement on? I'd also make the following bet:
Somebody HAS been sued for an otherwise justifiable shooting and an issue that came up in the trial was the removal of a magazine disconnect. The issue may not have been central to the trial verdict but it did cost the defendant money and time.
I'd also note that there is the current lawsuit of "Smith vs. Bryco" where Bryco is being sued for not including a magazine disconnect on their firearms. If an accidental shooting ever took place with a firearm where the magazine disconnect had been removed you would be talking some serious legal exposure.
Take a look at this organization:
http://www.firearmslitigation.org/rtk.html
These are the type of people who will be asking you about the removal of a magazine disconnect in your Hi-Power.