If 1day you piaking in toilet and next door cubicle got murder case, good luck explaining when they extract the TT data and it says you are right next to them cause the victim's bluetooth signal on their phone very strong.
Of course, if you're doing the wrong thing, proving your innocence at that time would be awkward for you.
If you're there but didn't do it, then trust in Justice and see how it through. Proximity to the scene of the crime isn't sufficient basis to convict you of murder.
Of course, being caught up in your sexual act and completely ignoring possible signs of violence in the next cubicle makes you a suspect - too bad for you. After all, the victim would not have laid there and willingly allowed himself to get killed without struggle. if the victim were unconscious, he would've had to be carried in too so there would be some indications of effort and DNA from the carrier on the victim.
Kinda extreme example, but thinking it through a little bit doesn't really allow for much of a logical conclusion. Unless your shag was THAT good.