If Family Matters were real, Urkel would've gotten murdered for wearing wires around a gang. Hell, he would've gotten popped sooner or later for running up in a cop's home unannounced lol.
Laura and her friends would've been smuts. Laura would've have gotten ran through at the college party when she got drunk and Urkel would've gotten stomped out by a nigga that was trying to hit.
Eddie would have wifed Myrtle Urkel the day he found out she came from old money.
Carl and Harriet would've both been on the DL and stepping out on each other.
Aunt Rachel and Mother Winslow would've had young niggas coming through all the time to smash.
Urkel would've gotten kidnapped by somebody for creating all of those inventions.