Sorry Dex, hit the post button too soon a few posts back.
The persecution the Christians suffered was from the Jewish Temple. Rome didn't care about what God was being worshiped, they were concerned with the money end of having an Empire.
Revelation shows your theory (that they wrote things down in timid ways so the authorities didn't bust them). The 7 letters to the 7 Angels of the 7 Churches certainly doesn't mince words about what some will suffer if they are found in that condition when Christ returns. If Jesus used this sort of language to the sinners in the Temple then that same style would have been used when this verse just below happened.
M't:10:19:
But when they deliver you up,
take no thought how or what ye shall speak:
for it shall be given you in that same hour what ye shall speak.
They would have spoken somewhat like this.
M't:23:33:
Ye serpents,
ye generation of vipers,
how can ye escape the damnation of hell?
M't:23:34:
Wherefore,
behold,
I send unto you prophets,
and wise men,
and scribes:
and some of them ye shall kill and crucify;
and some of them shall ye scourge in your synagogues,
and persecute them from city to city:
M't:23:35:
That upon you may come all the righteous blood shed upon the earth,
from the blood of righteous Abel unto the blood of Zacharias son of Barachias,
whom ye slew between the temple and the altar.
M't:23:36:
Verily I say unto you,
All these things shall come upon this generation.
M't:23:37:
O Jerusalem,
Jerusalem,
thou that killest the prophets,
and stonest them which are sent unto thee,
how often would I have gathered thy children together,
even as a hen gathereth her chickens under her wings,
and ye would not!
M't:23:38:
Behold, your house is left unto you desolate.
When counting the entire time Rome was in control is one empire. If they had 50 rulers it was still one empire.
Re:17:10:
And there are seven kings:
five are fallen,
and one is,
and the other is not yet come;
and when he cometh,
he must continue a short space.
Re:17:11:
And the beast that was,
and is not,
even he is the eighth,
and is of the seven,
and goeth into perdition.
The list has 11 names in it, don't take that as a sign that it doesn't match a list that only goes as high as 8. The whole list below is part of the
The Early Emperors Augustus Tiberius Caligula Claudius Nero Galba Otho Vitellius Vespasian Titus Domitian
The 5 fallen ones are Babylon, the Medes, the Persians, Alex, one of Alex's generals.
The 7th is Satan and the last king over Jerusalem before Christ is the Beast from the Pit.