Most of your gripes are not NEC violations. Most things in the NEC apply when the wiring was installed and are generally not required to be updated as the code changes every 3 years. Even if there are "violations", there may not be an enforcement mechanism at the user level (e.g. cord and plug things) -- it typically is only for things that require inspections, such as permanent wiring. In an employee situation, OSHA may enforce some of these other issues.
Is that "cord" to the camera in your photo a 120V cord or a low voltage cable? Low voltage cables have less stringent rules and could probably violate all of the "cord" rules and still be legal. There is a difference between cord and cable, low voltage and voltages over 50V.
strip outlets,the rules on daisy chaining. Not an NEC issue. Instructions say not to do that because UL has not evaluated them to be daisy chained. Personally, I don't see the issue with this if they all have 15A circuit breakers.
extention cords used permanently. 400.8 has some restrictions on cord (such as running them through windows, doors, floors, ceilings, or using them in place of permanent wiring methods). I've never seen anyone enforce this other than OSHA.
overloading a 15 amp with other appliances added together like freezers on microwave circuits over the 80%. This isn't necessarily a rule. You can load a branch circuit to 100%, but an individual receptacle is limited to 80% if there is more than one on the circuit. A power strip could allow this to be violated. Again, these are difficult to enforce rules that everyone violates.
Cord and plug items over loading single duplex outlets with multiple strips. How do you know it is overloaded? Do these have circuit breakers in the strips and are they blowing? I've even daisy chained power strips when I had about 20 wall wart power supplies to connect and each one drew a fraction of an amp. Technically a violation, but it would have taken months to get another receptacle installed, and it would have been an additional cord coming out of the rack which I did not want to have.
Running extention cords permanently over doors,including ones that go outside? Already mentioned 400.8.
Also using those cheap non grounded 2 prong brown extention cords from 80s with 3 openings at other end.. Nothing wrong with that as long as the cord is sized sufficiently for the load (again, other than using extension cords in place of permanent wiring).
For old buildings that were wired in the 50's and 60's, they may not have sufficient circuits for what people want to run today. Do you expect someone to spend thousands to run new circuits when a power strip or extension cord may solve the problem? That is certainly the better solution, but not possible for many owners. A landlord would have to raise rent to cover those costs and maybe the market wouldn't support that level of rent. The proliferation of new rules in the code is not helping to reduce costs (e.g. AFCI and GFCI requirements, especially if you have an obsolete panel like a Zinsco or a filled up panel).
