This has been discussed a few times before so please please search under "tranquilizer" and you'll find at least a dozen threads- a couple apply.
It is certainly possible but riddled with all the problems that prevent anyone from even getting a decent photo. In my opinion, if you can't photograph it, you're never going to dart it.
IF you ever did get one darted it could cover a lot of ground before it might go down. Unlike anything you see on TV, the best and safest drugs (that you would use to do this) take at least 5 minutes to take effect. Think about how far you can run in 5 minutes? Of course this can also be overcome in a number of ways...
You'll see a lot of talk about measuring drug doses, problems with dart guns etc, but I assure you that those are not significant issues. They are easily overcome by people who know what they are doing. But as Robo said in June....
QUOTE
1. There are no places where bigfoot are 'frequently' seen. Even in so called hotspot areas, a fleeting bigfoot sighting that lasts several seconds at most is usually a once in a lifetime experience, even for people that spend weeks and months trying to have a second sighting.
Probably 99.999% of the obstacle is point #1 though. Sightings are so rare that you can't just do sit in a tree and wait for one to stroll by.