Since so many conspiracy theories are starting to be shown to be true, it is suprising to see that the Labor bomb theory, so popular at the time of the sinking, seems to have vanished completely from the official narrative https://en.wikipedia.org/wiki/RMS_Titanic_alternative_theories

Initially, White Star denied anyone had even died https://www.ibiblio.org/prism/mar98/wallstreet.html

Morgan had just had his ship (whichever one it was, other conspiracies dovetail tidily with this one) blown to kingdom come when he expected something else to happen. This was not part of the plan and they needed time to come up with a reasonable story. What they had to hide the fact that the sinking of the titanic was payback from Labor https://en.wikipedia.org/wiki/U.S._Steel_recognition_strike_of_1901

The bombing of the Times has been similarly scrubbed from history http://articles.latimes.com/2010/oct/03/opinion/la-oe-irwin-bombing-20101003

"The terrorism that gripped America 100 years ago is barely mentioned in California history books today. The Times long ago resigned itself to making at least a modicum of peace with the unions. The attack on the newspaper is now regarded as an embarrassment to organized labor, which has never gotten around to an unequivocal denunciation of it. A 1996 history of the Ironworkers Union says that "the dynamite conspiracy and the bombings are neither a point of pride nor a reason for guilt. The Iron Worker leadership had no real option other than to succumb in the open shop battle, which was unacceptable to them.... And despite other consequences of the dynamite campaign, they did save the union. The international officers stretched the limits of zeal in a righteous cause."

Why didn't Labor take credit at the time? When Wall Street was bombed in 1920, no one took credit then, either, but look where they parked:

http://www.dailytelegraph.com.au/news/the-1920-bombing-of-new-yorks-wall-street-remains-unsolved/news-story/e89abcf609b7c5502de0358a135018a1

"Hardly anybody took much notice of the old horse and its dilapidated cart that was making its way along the road, stopping in front of the J.P. Morgan bank."

If the Labor bombing theory was suppressed to because the hit was so successful and might give others ideas, that plan has certainly failed miserably- Ted Kaczynski was obsessed with the iceberg on which he thought the Titanic supposedly foundered.