Yeah, it seems like thieves are changing their tactics. Used to be motochorros were real popular, but everyone's getting very cautious when they hear a motorcycle approaching.
Used to be that many coordinated thefts, particularly at night, were being done by somewhat shabby-looking people, making it easier for people to avoid shabby-looking people and not get caught. So they started putting on nice clothes and suits and surprised people. Now people are hesitant to stop and give anyone "the time of day", particularly at night.
Now they are coming up in taxis! I wonder if a taxi driver had his car stolen or hijacked, or if he felt he wasn't making enough money and could join the new "taxichorros" in a "ground floor" opportunity (too many taxi drivers that I don't like, for various reasons,,,heh).