Suspicious individual - Ajijic Centro

Someone pressed the buzzer to our casa. I walked out to see and no one was there. Coincidentally, the maid was walking by and pointed out a young man standing beside a motorcycle and said that she saw him ring the buzzer. When he saw that he had been pointed out, he got on his moto and drove off - looking quite sheepish. No idea what this all meant but he was a young (20s) Mexican and the bike was Jalisco-plated 198EJ.

Just a head's up, in case...