the.com/intruder

Someone who mistook your boundaries for suggestions.

means Someone who enters a place or situation without permission or welcome.

from From Latin intrudere — in- 'in' plus trudere 'to thrust, push' — the same trudere that gives us 'extrude' and 'protrude.' An intruder is literally one who thrusts themselves in, shoving their way into a space that was closed to them. The word pushed into English around the 15th century, carrying that forceful, unwelcome shove in its very bones.

legal sense
present without consent, not necessarily breaking anything
security systems
intruder alerts outnumber actual intruders by miles
etymology
from latin intrudere, to thrust in
irony
often invited by an unlocked door, not a crowbar
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