A Red X typically indicates "stop, do not enter". Whether it is a prefabricated sign, or drawn on cardboard in crayon, or made with red tape, the meaning remains the same, especially if posted on a door.
During times of plague, a red X was to serve as a warning that occupants of the house were sick, so do not enter.
In disaster search and rescue, Federal Emergency Management Agency (FEMA) Search and Rescue Teams use a Red X on housing/structures (with Date) to indicate "structure unsafe to enter" and people must have permission, in writing, to enter to make repairs. It does not mean the structure is condemned, just unsafe in its current condition. Structures would also be marked to show Searched; Deaths/Bodies Recovered; Deaths/Bodies not recovered yet; Date searched...etc. Each "quadrant" of the X holds this specific information, ALWAYS with specific info put into one specific portion of the X. See this page for an example picture.
"Red Tape" is not red, or even tape - it is a colloquial expression meaning "sluggish, plodding bureaucracy". To repeat: It is just an expression - it has nothing to do with "tape", red or otherwise.
It is red tape.
Red Tape - album - was created in 1976.
Red tape
Police use a variety of tapes to cordon off crime scenes. The tape might be a cautionary yellow color or any number of colors, including red and white tape. The tape means that no one can enter that is not part of the police force.
Tape, as in "Tape worm", "Red tape" and this is the other one although the word "Ducked" is spelt "Duct", "Duct tape".
The duration of The Blood Red Tape of Charity is 600.0 seconds.
Red (red tape, red letter, red pepper, red handed)
It means they have the plague, Stay away.
16" layout when framing a wall(spaced every 16")
My parents put red tape all around my Christmas gift.
That person is underage.