Many people are not familiar with labor laws, and thus misspeak when talking about unionization and strikes.
1) Forget what you might hear.
2) The union won't go on strike.
3) They can't afford to
4) There are some other tactics, but the union wouldn't dare
5) Non-strike (non-picket) actions would lead to disaster for the union.
6) And a strike would break up the union
7) A few other CM's might not cross a line, but MOST would cross
8) The facts are simple
. . . they can't picket on company property
. . . thus, they could only picket at the main highway
. . . visitors would probably not even see the pickets
. . . if they did, they couldn't block the highway
. . . thus, crossing a line is not hard
. . . there would be replacement workers lined up FAST
. . . temporary replacement workers could be hired quickly
. . . the company could issue an ultimatum, then fire strikers
. . . temp workers would then become permanent
. . . union workers come back only as temps leave (likely)
. . . other WDW employees not crossing a line could be fired
. . . guests would not give up WDW to honor a picket line
. . . even other union workers would cross for a vacation
. . . without economic harm, a strike is not productive
NOTE: At some companies in Right-to-Work states, a strike might work, but at amusement parks in Florida, a strike would cripple or greatly weaken the union. There are just too many people willing to take the strikers' place. If this was not the case, the union would have struck WDW long ago.