A SIDEWALK HAZARD’S SOCIAL MEDIA STRATEGY A coverless manhole just west of Shepherd on 34th St. in Garden Oaks has taken to Twitter to broadcast its plight. “I am a gaping hole in the city’s underbelly,” declares Gringo Trap 34, between drooling appreciations of photos of attractive manhole covers posted on other Twitter streams. By the hole’s third-ever tweet, yesterday, it had snared a response from Mayor Parker, who commiserated over problems caused by copper thieves. (“Like roaches, they mess up more than they take,” quipped the mayor.) Shout-outs to various reporters followed. But as of Friday afternoon, the square hole under the constable sign is still uncovered, and Gringo Trap 34 has posted its latest “glamor shot.” “I may be pretty,” reads the latest report, “but that doesn’t mean I won’t tear your ACL.” [Twitter] Update, 9:13 pm: The Gringo Trap 34 account appears to have been suspended, but its tweets live on in this Chronicle story. Photo: Gringo Trap 34