I live in SEH and cache/hike around these hills alone all the time. That doesn't make it safe, just says a little about maybe my naivete! Anyway, I believe the signs are recent in the last some months as there was a sighting around Lake San Marcos, the lake/neighborhood area that's just on the downside of the microwave tower hill. It wasn't a big news event, and it's the second sighting event. Last year (or two ago) there was another sighting in the Cal State San Marcos campus area. No one has been attacked and no pets taken as meals (except for the coyotes occasionally). But needless to say, in spite of having cell phone, electric zapper, pepper spray with me, it may be better sense to not be alone after all.