As much as I hesitate to stay home alone on Sunday (for I believe that is VERY dangerous), Indult Masses are also extremely problematic.
Besides the fact that they are compromised, and pretend Vatican II and the Conciliar Church "isn't that bad", which leads people into a sleepy, relaxed false sense of security about the raging war that we're actually in...
Most Indult/Motu Masses are said in SHARED FACILITIES where the Novus Ordo Mass is also said edit: and "Communion in the Hand" is practiced.
Do you believe the Novus Ordo Mass can be valid? Yes or No.
Yes? Then you might be stepping on Sacred Particles while attending your proper Tridentine Mass with Communion on the tongue. The Novus Ordo uses Communion in the Hand EXCLUSIVELY and it's a fact that particles are lost when Communion is distributed in this manner. So unless the "cleaning crew" has cleaned the church before your Tridentine Mass, you might be stepping on Our Lord.
No? Then you have to worry about the priest distributing Novus Ordo "cookies" reserved in the tabernacle during (what is supposed to be) Communion of the Faithful.
For these reasons, I believe it is imperative for ALL Catholic Faithful to RED LIGHT all Tridentine Masses held in a shared facility (Novus Ordo also said there, with CitH practiced). Even if that means you have no other place to attend Mass. Find a better place to live, even in a different state, and move there.
But receiving bread in lieu of Communion isn't an option, and stepping on Our Lord from the last Novus Ordo Mass isn't an option.
P.S. I'm not a theologian, but I do know that:
A) many, many learned Trads have their doubts about the New Rite of Ordination and/or the New Rite of Consecration.
B) Traditionally (pardon the pun), it is commonplace to conditionally ordain priests (as necessary) when they are going to be saying Mass for groups in the Traditional movement.
C) I can't argue with their reasoning: Better to be safe than sorry. And you can't play games when you're talking about validity of a priest. Want to assist at the Holy Sacrifice of Mass? Want to receive Our Lord? Want your (perhaps mortal) sins forgiven? He better be a priest or you're OUT OF LUCK on all counts.
Virtually no "indult" priests are ordained (in the old Rite) by bishops who were consecrated in the old Rite.
This isn't as clear-cut as the problem I described above, but that doesn't mean it's trivial or a non-issue.