To avoid problems with unknown job types let's hide them in the default view - and require people to use the toggle hidden jobs button to show them. This will reduce the inconvenience when buildbot changes are deployed without a corresponding Treeherder change having been made first.
Personally I'd prefer if we just rejected these jobs outright. Unknown talos jobs can get misclassified in Perfherder, which leads to bad data polluting the database.
We're going to replace exclusion profiles with people always using the in-tree (mozilla-central) tier values instead (bug 1387640).