MLS has reprimanded Dynamo fans for what it deems to be poor behavior. MLS cited three different occasions in which Dynamo fans ignited prohibited smoke bombs in the stadium, among other
A letter sent by MLS sent to Houston supporter groups listing violations of the MLS Fan Code of Conduct committed by Dynamo supporters included "multiple illegal smoke bombs were brought into the stadium, ignited and thrown onto the field" ... "various objects that presented a safety risk thrown onto the field in the direction of players and stadium personnel" ... "obscene language and gestures by multiple supporters."
As a result, MLS is not permitting Dynamo traveling fans to "utilize items listed as Supporter Group Exemptions in the MLS Prohibited Items policy (e.g. flags, banners, confetti, drums). This sanction shall continue to be in effect until otherwise notified by MLS."
Dynamo president Chris Canetti told Local 2 Sports: "We will work closely with league and supporters groups to make sure the game can be celebrated in a fashion that is safe and enjoyable for all of our fans."