Technician reported a ramp employee walked into the red safety area while the engine was still on. Another Technician stopped the ramp employee. Reporter stated these types of events have become a common occurrence.

Narrative

Aircraft X arrived in ZZZ from ZZZ1 operating as flight ABCD. Earlier in the day; we deferred the APU generator under MEL XX-XX-XXX. This MEL requires that an engine be left operating until ground AC power is connected and established at the gate. When the aircraft came to a stop; one ramp employee began entering the red safety area in the vicinity of the still operating engine. My colleague immediately gained this individual's attention and informed him that the engine was still operating. The ramp crews in ZZZ have been experiencing an ongoing high employee turnover rate. Coincident with the constant staffing changes; I have noticed a trend of 'lack of respect' for running aircraft engines. While not appearing malicious in nature; it appears that a significant percentage of ramp personnel simply do not appreciate the dangerous environment within which they operate on a daily basis. On multiple occasions; I have observed ramp personnel placing cones and walking in front of engines which had been shutdown less than just 2 or 3 seconds prior. Even though the engines were technically shut down in these instances; they had hardly even begun to spool down by this point. I have brought this fact to the attention of the individuals in question each time. However; it has always been a different individual on every occurrence. Again; while I don't feel the actions I've witnessed were committed with any ill intent; I do feel they exhibit a lack of awareness and a normalization of deviance.Also of note; inoperative APUs and inoperative APU generators result in a change from routine operating procedures. Engines may be running longer than anticipated; or they may need to be started out of the usual sequence. When able; at a minimum; a shift briefing or group huddle to discuss any specific issues should occur prior to the arrival and/or departure of aircraft which fall into this category. I believe this step may in fact already take place in our station. I am not privy to what specific training the ramp personnel currently receive regarding the hazards of engine ingestion and jet blast. I do feel; however; that a dedicated training module highlighting these particular threats is warranted before the next deviation claims a victim. Perhaps providing case studies of engine ingestion and jet blast events may drive the point home.